Status: Accepted
Owner: ----
Labels: Type-Defect Priority-Medium EasyToFix

New issue 1456 by ondrej.certik: use pyflakes to identify simple bugs in  
sympy and fix them
http://code.google.com/p/sympy/issues/detail?id=1456

Example:

sudo apt-get install pyflakes

$ pyflakes sympy/integrals/
sympy/integrals/rationaltools.py:3: 'div' imported but unused
sympy/integrals/rationaltools.py:121: redefinition of unused 'symbols' from
line 3
sympy/integrals/risch.py:4: 'Pow' imported but unused
sympy/integrals/risch.py:5: 'Function' imported but unused
sympy/integrals/risch.py:7: 'Atom' imported but unused
sympy/integrals/risch.py:8: 'Integer' imported but unused
sympy/integrals/deltafunctions.py:2: 'Symbol' imported but unused
sympy/integrals/deltafunctions.py:2: 'S' imported but unused
sympy/integrals/deltafunctions.py:2: 'Wild' imported but unused
sympy/integrals/integrals.py:2: 'Pow' imported but unused
sympy/integrals/integrals.py:9: 'apart' imported but unused
sympy/integrals/integrals.py:10: 'limit' imported but unused
sympy/integrals/integrals.py:13: 'DiracDelta' imported but unused
sympy/integrals/integrals.py:13: 'Heaviside' imported but unused
sympy/integrals/integrals.py:111: redefinition of unused 'limit' from line  
10
sympy/integrals/__init__.py:8: 'integrate' imported but unused
sympy/integrals/__init__.py:8: 'line_integrate' imported but unused
sympy/integrals/__init__.py:8: 'Integral' imported but unused
sympy/integrals/tests/test_rationaltools.py:4: 'log_to_atan' imported but
unused
sympy/integrals/tests/test_rationaltools.py:4: 'log_to_real' imported but
unused
sympy/integrals/tests/test_rationaltools.py:4: 'ratint_ratpart' imported
but unused
sympy/integrals/tests/test_lineintegrals.py:1: 'cos' imported but unused
sympy/integrals/tests/test_lineintegrals.py:1: 'Integral' imported but  
unused
sympy/integrals/tests/test_lineintegrals.py:1: 'sympify' imported but unused
sympy/integrals/tests/test_lineintegrals.py:1: 'integrate' imported but  
unused
sympy/integrals/tests/test_lineintegrals.py:1: 'diff' imported but unused
sympy/integrals/tests/test_lineintegrals.py:1: 'pi' imported but unused
sympy/integrals/tests/test_lineintegrals.py:1: 'sin' imported but unused
sympy/integrals/tests/test_integrals.py:1: redefinition of unused 'atan'
from line 1
sympy/integrals/tests/test_integrals.py:1: 'I' imported but unused
sympy/integrals/tests/test_integrals.py:5: 'skip' imported but unused
sympy/integrals/tests/test_integrals.py:5: 'XFAIL' imported but unused


it finds (among other things) that the Heaviside is imported but never
used, so it should be removed.

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